Are lilac bushes toxic to horses?

According to the University of Arkansas, Lilac Syringa Vulgaris is low on the scale for toxicity to livestock, and the plants are generally considered non-toxic to humans (http://www.aragriculture.org/horticulture/ornamentals/toxic_plants.htm).  While lilac bushes are not considered toxic to livestock, it is wise to keep horses away from the bushes and do not feed them clippings.

Persian lilac (Melia azerdarach) which is not related to true lilacs, is poisonous to dogs and horses, according to the ASPCA Animal Poison …

Are persimmons potentially harmful to horses?

The American persimmon can be poisonous to horses. The problem is associated with tannins in the fruit. The tannins can precipitate from the fruit in the stomach and form a sticky mass. This mass can cause ulcers in the stomach and even lead to rupture of the stomach if the horse was to eat a large quantity of the fruit. This can also cause colic due to impaction in the stomach or the small intestine. Signs are colic and weight …